18-letter words containing i, r, v
- rr lyrae variables — any of the very regular, short-period, pulsating variable stars having periods between 1.5 and 29 hours
- russian revolution — Also called February Revolution. the uprising in Russia in March, 1917 (February Old Style), in which the Czarist government collapsed and a provisional government was established.
- sacrificial victim — a person who is ritually killed with the intention of propitiating or pleasing a deity
- seasonal variation — season-related variation
- second triumvirate — the coalition and joint rule of the Roman Empire by Antony, Lepidus, and Octavian, begun in 43 bc
- secondary deviance — deviant behavior that results from being publicly labeled as deviant and treated as an outsider.
- selective abortion — the aborting of particular embryos for medical or social reasons
- selective breeding — the raising of animals with particular genetic traits through careful choice of parents
- self-advertisement — a paid announcement, as of goods for sale, in newspapers or magazines, on radio or television, etc.
- service department — a repair shop
- set priority level — (SPL) The way traditional Unix kernels implement mutual exclusion by running code at high interrupt priority levels and thus blocking lower level interrupts.
- silver certificate — a former paper currency first issued in 1878 by the U.S. federal government for circulation, equal to and redeemable for silver to a stated value.
- silvery cinquefoil — any of several plants belonging to the genus Potentilla, of the rose family, having yellow, red, or white five-petaled flowers, as P. reptans (creeping cinquefoil) of the Old World, or P. argentea (silvery cinquefoil) of North America.
- silvery spleenwort — a fern, Diplazium pycnocarpon, of eastern North America, having fronds from 20 to 30 inches (50.8 to 76.2 cm) long on yellowish-green stalks.
- simone de beauvoir — Simone [see-mawn] /siˈmɔn/ (Show IPA), (Lucie Ernestine Marie Bertrand) 1908–86, French playwright, novelist, and essayist.
- social environment — the environment developed by humans as contrasted with the natural environment; society as a whole, especially in its relation to the individual.
- sodium-vapour lamp — a type of electric lamp consisting of a glass tube containing neon and sodium vapour at low pressure through which an electric current is passed to give an orange light. They are used in street lighting
- solvent extraction — Solvent extraction is the separation of a particular substance from a mixture by dissolving that substance in a solvent that will dissolve it, but which will not dissolve any other substance in the mixture.
- special relativity — the state or fact of being relative.
- split-level cooker — a cooker that is designed with a separate oven and hob so that they can be fitted wherever is most convenient in the kitchen
- st. lawrence river — a river in SE Canada, flowing NE from Lake Ontario, forming part of the boundary between New York and Ontario, and emptying into the Gulf of St. Lawrence. 760 miles (1225 km) long.
- standard deviation — a measure of dispersion in a frequency distribution, equal to the square root of the mean of the squares of the deviations from the arithmetic mean of the distribution.
- standard of living — a grade or level of subsistence and comfort in everyday life enjoyed by a community, class, or individual: The well-educated generally have a high standard of living.
- strong derived set — the set of all strong accumulation points of a given set.
- superior vena cava — See under vena cava.
- supportive therapy — any treatment, such as the intravenous administration of certain fluids, designed to reinforce or sustain the physiological well-being of a patient
- survival mechanism — something you or your body does automatically, in order to survive in a dangerous or unpleasant situation
- tardive dyskinesia — a disorder characterized by restlessness and involuntary rolling of the tongue or twitching of the face, trunk, or limbs, usually occurring as a complication of long-term therapy with antipsychotic drugs.
- teacher evaluation — the process of vetting teachers to maintain teaching standards
- technical reserves — Technical reserves are amounts of money set aside to pay for underwriting liabilities.
- telephone receiver — a device, as in a telephone, that converts changes in an electric current into sound.
- tender loving care — considerate and kindly care, as of someone who is ill, upset, etc
- the french riviera — the Mediterranean coastal region of France from Cannes eastward to Italy
- the movie industry — the industry that makes entertainment films or movies
- the operative word — If you describe a word as the operative word, you want to draw attention to it because you think it is important or exactly true in a particular situation.
- thiruvananthapuram — a state in SW India: formerly the regions of Travancore and Cochin. 15,005 sq. mi. (38,836 sq. km). Capital: Thiruvananthapuram.
- three-day eventing — participation in a three day equestrian competition consisting of dressage, cross-country jumping, and stadium jumping
- to play favourites — to display favouritism
- to scrape a living — If you say that someone scrapes a living or scratches a living, you mean that they manage to earn enough to live on, but it is very difficult. In American English, you say they scrape out a living or scratch out a living.
- transverse section — cross section (def 1).
- transylvanian alps — a mountain range in S Romania; a SW extension of the Carpathian Mountains. Highest peak: Mount Negoiu, 2548 m (8360 ft)
- traveling salesman — a male representative of a business firm who travels in an assigned territory soliciting orders for a company's products or services.
- travelling library — a mobile library in which a vehicle such as a van delivers books to be borrowed
- tristimulus values — three values that together are used to describe a colour and are the amounts of three reference colours that can be mixed to give the same visual sensation as the colour considered
- trustee investment — an investment in which trustees are authorized to invest money belonging to a trust fund
- turbine ventilator — a ventilator, usually mounted on the roof of a building, deck of a ship, etc., having at its head a globular, vaned rotor that is rotated by the wind, conveying air through a duct to and from a chamber below.
- ulcerative colitis — chronic ulceration in the large intestine, characterized by painful abdominal cramps and profuse diarrhea containing pus, blood, and mucus.
- ultraviolet filter — a filter used on a lens to absorb ultraviolet radiation that may impart an undesirable blue cast to a photograph.
- universal coupling — a coupling between rotating shafts set at an angle to one another, allowing for rotation in three planes.
- universal debugger — (tool, parallel) (udb) KSR's interactive source level debugger for serial and parallel programs written in KSR, Fortran, KSR C and KSR1 assembly language. Udb is a source level debugger for testing and debugging serial and parallel programs; it is compatible with GDB and dbx. The user can direct udb either by typing commands or graphically through an X-based window interface; the latter provides simultaneous display of source code, I/O and instructions. For parallel programs, operations can be carried out per-thread.